The alm hl009 spool head assembly kit right hand thread suits the following brands homelite trimmers using 24 mm 0095in line ryobi pbc3046b pbc3046e pbc3046yb pbc3046ye plt3043ye plt2543y pbc3020y rpt2543c rbc254fc rlt254fc expand it contains 1 x housing 1 x spool line 1 x spool retainer bump knob 1 x spring line diameter 24mm